"With Instagram Stories, you don’t have to worry about
overposting. Instead, you can share as much as you want
throughout the day — with as much creativity as you want. You can
bring your story to life in new ways with text and drawing tools.
The photos and videos will disappear after 24 hours and won’t
appear on your profile grid or in feed."

Instagram CEO Kevin Systrom
told The New York Times that, “Stories will
alleviate a ton of the pressure people have to post their
absolute best stuff.”

Like Snapchat, Instagram Stories from your friends
will be shown in circular thumbnails at the top of your feed that
you can tap to view. A story you share will only be visible to
your friends if you have a private account — otherwise it will be
visible to anyone who stumbles on your profile.

Instagram

Instagram is doing something different from Snapchat by
letting you share a story with a group of friends, but apart from
that, the feature works almost identically to Snapchat.